A Gigai (義骸, faux body) is an artificial body that allows Shinigami to remain in the Human World for an extended period, either due to temporary loss of powers or extended missions. In certain circumstances, a Shinigami will need a way to stay in the Human World for long periods of time, interact with the living, and/or recover their powers when the need arises, all of which they can't do in spirit form. Thus, the Gigai was developed. While the body is synthetic, it functions and operates exactly like a natural one, including but not limited to blood flow and the like. Unlike the normal Shinigami body, a Gigai is detectable by humans who are not at all spiritually aware, thereby allowing the Shinigami to interact with them. This also means that a Shinigami in a Gigai has to behave like a normal Human, this task can prove to be somewhat challenging to inexperienced Shinigami, due to the cultural and technical differences between the Human World and Soul Society.

The Hōgyoku (崩玉, Crumbling Orb; Viz: "Breakdown Sphere") (also referred as the Orb of Distortion) is a unique substance in the form of a small orb that was thought to be able to dissolve the boundaries between a Shinigami and a Hollow, granting either the powers of the other. However, Aizen explained that it actually materializes the hearts around it. In other words, it materializes a persons inner desires. It was invented roughly 101 years before the main events of the story, by ex-leader of the Shinigami Research and Development Institute, Kisuke Urahara.

Artificial souls (義魂, gikon), as the name suggests, are souls designed by Shinigami scientists to separate a Shinigami's spirit from a Gigai, should they be inhabiting one, or to evict stubborn spirits from their corpses if necessary. Artificial souls are used by ingesting a gikongan (義魂丸, Artificial Soul Pill) which forces the soul out of the body and takes control of it, operating in a pre-programmed manner until removed by the Shinigami. It is commonly called Soul Candy, as the Shinigami Women's Association complained that the name gikongan wasn't cute and had it changed.[1] To fit with the more informal name, Soul Candy is contained in PEZ-like dispensers with cartoon characters on top. The souls themselves apparently have personalities to match the cartoon character in question; for example, Rukia Kuchiki's favorite version, Chappy the Rabbit, is a hyperactive character that tries to restrain Ichigo when given control of Rukia's Gigai and even speaks in a cutesy baby talk manner. While Captain Tōshirō advanced squad is in the real world, their artificial souls were specially designed by Lieutenant Yachiru Kusajishi, unfortunately for them, these artificial souls where specially designed to be strange and completely contradictory to their personalities. It is revealed at the end of the omake in Volume 25 that Yachiru's plan was to take candid photos of these Shinigami while the substitute souls inhabited them, and to sell the photos. [2]

Tenshintai (転神体, lit. "Change [Death] God Body", Viz: "Divine Transfer Body"): Artifact belonging to the Onmitsukidō, but invented and tested by Urahara. The item is a vaguely human-shaped, man-sized doll used to forcibly materialize the spirit of a Zanpakutō into the real world when stabbed by the Zanpakutō. In doing so, the user can subjugate the spirit and attain the Bankai of their Zanpakutō. The materialization lasts for about three days, after which the spirit reverts back into the doll that spawned it. Without this invention, achieving the Bankai takes at least ten years, not to mention the many years of combat experience needed. This method, however, is very dangerous due to the fact that it forcibly materializes the Zanpakutō's spirit. If used more than three times consecutively, it is possibly fatal to the user.

Tenkai Kecchu (転界結柱, World-Shifting Binding-Posts): a device which creates an enormous one spiritual unit of area radius Senkaimon bound by four linked points. When activated the device swaps something that it encircles with something else in Soul Society.

Karakura-Raiser Transformation Watch: A watch shown in a filler arc made to give to Kon to protect Karakura Town in Ichigo's absence. The watch has the following features: Transformation: The watch's main function, it covers Kon in a puff of smoke as gives him a superhero outfit designed by Uryū. Despite its flashy appearance, the suit has little to offer, it gives the user no increases in strength or speed, nor does it give the wearer the ability to fly. Raiser Beam: The only effective weapon in the suit. Kon spells out Raiser with his body then slaps his hands together to emit a beam strong enough to kill a large Hollow. However, this attack takes up a lot of energy and can only be used once per transformation. Communicator: The watch also serves as a communicator between Kon and Urahara. Electrocute: Urahara can also have the watch shock Kon if he disobeys his orders.

Anti-Hierro Armor: A protective armor designed especially to engage in direct battle with enough durability to smash through an Arrancar's Hierro. It is also rather effective defensively, able to protect the wearer's said body part from damage, even if the armor itself is destroyed in the process.